None really needed, the marker is exceptional out of the box. However, it's a bit of an air hog.
Recomend barrel and reg.

Strengths:

Best out of the box marker I've ever seen!
Great Trigger!
Good Barrel / reg.

Weaknesses:

Battery install could be easier.
A bit of an air hog.

Review:

When I ordered this marker practically everyone involved had a similar reaction. "A what?"

The reaction when it arrived was met with a great deal more enthusiasm.

First paint out of the marker was running around 310fps. Minor adjustment to the reg quickly brought the marker down to 285 and we started shooting in unlimited ramp mode.
At speeds in the neighborhood of 30bps you can empty a hopper through this thing nearly as fast as just opening it up and turning it up side down.

After half a case of that kind of fun, we set it down to 15BPS and waited for open play to start that evening. No breaks, no failures, no problems at all.

There is something satisfying about showing up at the field with a flame thrower marker of this quality that no one has ever seen before and few had even heard of to that point.

After the first game their curiosity was getting the best of them. Particularly those that fell to the hail of paint from the promasters first outing. There were three of them by the way.

Seeing the interest that was being generated by this new marker, the shop owner provided air and paint for those that wanted a test drive that evening. I was delighted to let anyone that was interested shoot this thing.

By the end of the day the promaster had been switched into and out of every firing mode it has and had devoured no less than 3 cases of paint without so much as a sneeze. No broken paint, no broken parts, and alot of new ICD fans.

As for me, I shot out 10 people in three games and for a good while was holding down the left side of the field all by myself.

If your in the market for a new marker. Find one of these new Promasters from Indian Creek and check it out for yourself. Better yet, just take our word for it and order one. I guarantee you will not be disappointed!

Great job ICD!

Conclusion:

If I had $1,500.00 bucks burning a hole in my pocket and was looking for a new marker I'd have several choices. I could choose from some of biggest and most prestigious names in the paintball industry. If I spent all that money on a one marker and hopper I would have no better setup than I have in the Promaster and Halo B. So what to do...

Buy two Promasters, (Under $400.00 ea.) and spend the rest on paint!

Seriously, the Promaster is a class act! It will shoot with any $1000.00 plus maker ever made at a cost that will let you still have money to use it.

I don't give out 10's, nothing is perfect! I'd say 9.8 -

Buy one!

UPDATE....

After discussing a minor issue with ICD, they determined that I had a defective board. At the time they apparently did not have Promaster boards in stock and sent an FS/7 predator board in its place. On the surface this seems like a great thing. However, after installing the FS/7 board the marker bounced uncontrollably and velocity was all over the place. No amount of adjusting would correct this issue. After a couple more calls, ICD sent my original board back to me and this solved the bounce problem.

If you have a board issue with a Promaster and are sent the FS/7 board as a replacement you may have similar issues.

Overall, ICD did an excellent job of support and as new Promaster boards become available this will cease to be an issue.